Multiple work clamp for brush machines



C. JOBST z 0 m u m 3 62mm 0? Jol st April 3, 1928.

MULTIPLE WORK CLAMP FOR BRUSH MACHINES Filed May 1923 Patented Apr.3,1928.

' UNITED STATES 1,664,423 PATENT OFFICE."

CONRAD JOBST, OF TOLEDO, OHIO, ASSIGNOR TO THE TOLEDOAUTOMATIC BRUSH MA-CHINE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO.

MULTIPLE WORK CLAMP FOR BRUSH MACHINES.

Application filed May 14,

The invention relates to an improvement in work holders to be used inconjunction with brush machines adapted for the manufacture of smallbrushes, such as tooth brushes. A machine of this general type has beendescribed in my copending appli holder is so fashioned that it may beexactly I positioned in the machine in ordervto regis-. ter with therespective mechanisms, the brush backs themselves remaining clamped inthe holder until all off the operations are.

finished.

The object of this invention is to provide a multiple clamp work holderin which the brush backs may be quickly loaded and unloaded and yet willbe firmly held in position during the operation of the machine. This isaccomplished by certain novel features of construction which areillustrated in the accompanying drawings, in which Figure l is a planview of the improved work holder;

Flgure 2 is an end vlew thereof; Figure 3 is a side view.

The work holder comprises a base A which I is formed with a dove-tailedguideway, Bon its underside for engaging corresponding ways on asuitablebrush machine in order to secure exact alignment with theoperating mechanisms. A projecting lug C is also provided for engagingwith cooperating bearings on the machine to secure an exact positionlongitudinally of the ways.

On the upper side of the work holder there is an upstanding portion Dhaving a plane surface E on which are mounted the brush backs F, theforward ends F of which engage notched abutments G. These abutments arepreferably undercut to firmly press the backs against the surface D andto normally prevent disengagement.

The brush backs F, as shown, are provided with integral handles H formedwith a contracted portion H adjacent to the back thereby forming therounded shoulders I. For engaging these shoulders there are thebifurcated clamping jaws J which extend transversely from rods Kslidably arranged 1923. Serial No, 638,908.

inthe upstanding portion D of the work holder and extendinglongitudinally of the same. spring L is sleeved upon the opposite end ofeach rod K between a collar M and the end surface D of the workholder.The spring .yieldingly holdsthe jaws J in a position to clamp the brushbacks firmly to the work holder. 4 o

For loading the backs into the work holder, the shoulders I are engagedwith the yielding jaws 'J' and the handle is moved slightly against theaction of, the springjL whereuponthe'forward end of the brush back F maybe entered ,in the notched abutment G and the back snapped intoplace.Thus, it will be seen that I have provided a simple arrangement wherebythe brush backs they will be securely'held in position'during theoperation of the machine. It will be noted that the handles of'thebrush. backs extend out from the work holder and this forms a convenientmeans for transferring -may be quickly loaded and unloaded yet the Workholder to the various units of the machine' in which the drilling,tufting and trimming operations are to be performed. 2

What I claim as my invention is gagingthe end of said brush back, abifur cated abutmentfor engaging the contracted portion of said handleand yieldable in the lengthwise direction of the brush back, andresilient means for urging said yieldable abutment toward said fixedabutment.

2. In a brush making machine, a holder for a brush back of the typeprovided. with an integral handle having a contracted portion,comprising spaced abutments for respectively engaging the end of saidbrush back and the contracted'portion of said handle one of saidabutments being movable towards the other in the lengthwise direction ofthe brush back, and resilient means for urging said movable abutmenttowards the other.

3. In a brush making machine, a holder for a brush back of the typeprovided with an integral handle having a contracted portion, comprisinga V-shaped abutment having an under out for engaging one end, of saidbrush back, a yieldable bifurcated abut- 1. In a brush making machine, aholder for the brush back of the type provided with an integral handlehaving a contracted .portion, comprising a fixed abutment for en-'aligned fixed abutments for engaging the ends of the respective brushbacks, a series of yieldable abutments for engaging the opposite endsthereof, said two series of abutments being respectively arranged insubstantially straight lines parallel. to each other, and resilientmeans for urging said yieldable abutments towards said fixed abutments.

6. In a brush making machine, a. work holder for a plurality of brushbacks comprising a' base having a supporting surface, a series of V-shaped fixed abutments arranged transverselyof said base and projectingabove said surface, a series of cooperating bifurcated abutments spacedfrom said fixed abutments, and resilient means for urging saidbifurcated abutments toward said fixed abutments.

7. In a brush making machine, a work holder for a plurality of brushbacks 'comprising a base having a supporting surface, a series ofV-shaped fixed abutments ar ranged transversely of said base andprojecting above said surface, a series of co0perating bifurcatedabutments spaced from said fixed abutments, a series of rods secured tosaid bifurcated abutments and longitudinally slid able in said base,collars on said rods, and springs sleeved upon said rods between saidcollars and said base.

8. In a brush making machine, a work holder comprising a base havingasupporting surface, a fixed abutment on said base, a rod slidable insaid base, a movable abutment carried by said rod, and means foryieldingly urging said movable abutment towards said fixed abutment in adirection lengthwise of said rod.

9. In a brush making machine, a holder for a brush back of the typeprovided with an integral handle having a contract-ed portion comprisinga base, an abutment for engaging the end of said brush back,a'bifurcated abutment spaced from the first mentioned abutment andadapted to engage the contracted portion of the handle, one of saidabutments being fixedly mounted on said base and the other abutmentbeing movably mounted thereon, and resilient means for urging saidmovable abutmentlongitudinally of the brush back toward said fixedabutment to clamp saidbrush back in position.

10. In a brush making machine, aholder for a plurality of brush backs ofthe type provided with an integral handle having a contracted portioncomprising a base, a'

series of laterally aligned abutments for engaging the ends of the brushbacks, a series V of laterally aligned bifurcated abutments for engagingthe contracted portions of the handles, the abutments in one laterallyaligned series being fixedly mounted on said In testimony whereof Iaffix my signature.

CONRAD oBsr.

